CN218240708U

CN218240708U - Sequential control circuit

Info

Publication number: CN218240708U
Application number: CN202222243402.7U
Authority: CN
Inventors: 陈梦锟; 郑嵊新
Original assignee: Zhejiang Jiecang Linear Motion Technology Co Ltd
Current assignee: Zhejiang Jiecang Linear Motion Technology Co Ltd
Priority date: 2022-08-25
Filing date: 2022-08-25
Publication date: 2023-01-06
Anticipated expiration: 2032-08-25

Abstract

The utility model provides a time sequence control circuit, time sequence control circuit includes output module and motor drive module, output module is connected with motor drive module, output module is used for providing drive signal for motor drive module, including motor switch unit and relay delay unit in the motor drive module, motor switch unit is connected with the motor, motor switch unit is used for opening or turn-off of control motor, relay delay unit connects on motor switch unit, relay delay circuit is used for when the turn-off motor, and control motor switch unit time delay is turn-off. The utility model discloses can turn off the chronogenesis through relay time delay unit control relay, reduce the relay and draw the arc current, effectively avoid the relay adhesion to guarantee the normal operating of relay function, the security of motor also can obtain the guarantee.

Description

Sequential control circuit

Technical Field

The utility model belongs to the technical field of the motor drive technique and specifically relates to indicate a sequential control circuit.

Background

In the motor driving process, the on or off control of the motor is usually realized through a relay, and when the motor stops, the relay needs to be disconnected in time, so that the safety of the motor is guaranteed. But in the moment of relay disconnection, can correspondingly produce heavy current, the relay normally opens the contact and can produce and draw the arc, leads to the relay adhesion, and the relay function is invalid, and the operation safety of motor is difficult to obtain the guarantee.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the shortcoming among the prior art, providing a sequential control circuit, coming to the turn-off of relay through increasing relay time delay unit and providing the time delay to control relay turn-off time sequence can solve current relay and can produce the problem of drawing the arc current when turn-off, makes the relay can normal operating, and the operation safety of motor can be ensured.

The utility model aims at realizing through the following technical scheme:

the utility model provides a sequential control circuit, includes output module and motor drive module, output module and motor drive module are connected, output module is used for providing drive signal for motor drive module, including motor switch unit and relay delay unit in the motor drive module, motor switch unit is connected with the motor, motor switch unit is used for opening or shutting off of control motor, relay delay unit connects on motor switch unit, relay delay circuit is used for when shutting off the motor, and control motor switch unit delays the shutoff.

Further, the output module comprises a power supply voltage VCC, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a capacitor C1, a capacitor C2, a triode Q1, a triode Q2, a diode D1, a diode D2, a diode D3, a diode D4, a diode D5, a diode D6, a switch SW1 and a switch SW2, one end of the resistor R1 is connected with the power supply voltage VCC, the other end of the resistor R1 is connected with the anode of the diode D1 through the resistor R3, the cathode of the diode D1 is grounded through the switch SW1, the capacitor C1 is further connected in series between the anode of the diode D1 and the power supply voltage VCC, the base of the triode Q1 is connected between the resistor R1 and the resistor R3, the emitter of the triode Q1 is connected with the power supply voltage VCC, the collector of the triode Q1 is simultaneously connected with the anodes of the diode D2 and the diode D3, diode D2's negative pole output VM1 drive signal, diode D3's negative pole output VM1+ drive signal, resistance R2's one end is connected with supply voltage VCC, resistance R2's the other end passes through resistance R4 and is connected with diode D4's positive pole, diode D4's negative pole passes through switch SW2 ground connection, it has electric capacity C2 still to establish ties between diode D4's positive pole and the supply voltage VCC, triode Q2's base is connected between resistance R2 and resistance R4, triode Q2's projecting pole is connected with supply voltage VCC, triode Q2's collecting electrode is connected with diode D5 and diode D6's positive pole simultaneously, diode D5's negative pole output VM1 drive signal, diode D6's negative pole output VM 1-drive signal.

Further, when the switch SW1 is pressed, the output module outputs a motor forward rotation signal M1+, and when the switch SW2 is pressed, the output module outputs a motor reverse rotation signal M1-.

Further, the motor switch unit comprises a STOP interface, a relay KA1, a relay KA2, a resistor R5, a resistor R6, a triode Q3, a triode Q4, a diode D7, a diode D8, a diode D9, a diode D10, a diode D11 and a transient diode D12, wherein the STOP interface provides a STOP voltage, the first coil contact of the relay KA1 and the first coil contact of the relay KA2 are both connected with the STOP interface, the second coil contact of the relay KA1 is connected with the collector of the triode Q3, the base of the triode Q3 is connected with the first port of the resistor R5, the second port of the resistor R5 is connected with the output module to receive the VM1+ driving signal, the emitter of the triode Q3 is grounded, the second coil contact of the relay KA1 is further connected with the anode of the diode D7, the cathode of the diode D7 is connected with the STOP interface, the positive pole of the diode D7 is connected with the positive pole of the diode D8, the negative pole of the diode D8 is connected with the output module, the motor positive rotation signal M1+ is received, the second coil contact of the relay KA2 is connected with the collector electrode of the triode Q4, the base electrode of the triode Q4 is connected with the first port of the resistor R6, the second port of the resistor R6 is connected with the output module, the VM 1-driving signal is received, the emitter electrode of the triode Q4 is grounded, the second coil contact of the relay KA2 is also connected with the positive pole of the diode D9, the negative pole of the diode D9 is connected with the STOP interface, the positive pole of the diode D9 is also connected with the positive pole of the diode D10, the negative pole of the diode D10 is connected with the output module, the motor reverse rotation signal M1-, the static normally open contact of the relay KA1 and the static normally open contact of the relay KA2 are both connected with the positive pole of the diode D11, and the negative pole of the diode D11 is connected with the STOP interface, the movable contact of the relay KA1 is connected with one end of the motor, the movable contact of the relay KA2 is connected with the other end of the motor, and the anode of the diode D11 is grounded through a transient diode T1.

Further, the relay delay unit includes a capacitor C6 and a capacitor C7, one end of the capacitor C6 is connected to the second port of the resistor R5, the other end of the capacitor C6 is grounded, one end of the capacitor C7 is connected to the second port of the resistor R6, and the other end of the capacitor C7 is grounded.

The motor driving module is characterized by further comprising a motor control unit, the motor control unit is connected with the motor switch unit, and the motor control unit is used for controlling the current in the motor current loop and controlling the motor switch unit to be turned on or turned off according to the current in the motor current loop.

Further, the motor control unit comprises a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R11, a resistor R12, a capacitor C3, a capacitor C4, a capacitor C5, a triode Q6, a voltage regulator tube Z1 and a field effect tube Q7, wherein a drain electrode of the field effect tube Q7 is connected with a normally-open static contact of the relay KA1 and a normally-open static contact of the relay KA2, a source electrode of the field effect tube Q7 is grounded through the resistor R7, a grid electrode of the field effect tube Q7 is connected with one end of the resistor R9 through the resistor R8, the other end of the resistor R9 is connected with an emitter electrode of the triode Q5, a collector electrode of the triode Q5 is connected with a base electrode of the triode Q6, an emitter electrode of the triode Q6 is grounded, a collector electrode of the triode Q6 is connected with the emitter electrode of the triode Q5 through the resistor R10, a base electrode of the triode Q6 is also grounded through the capacitor C3, the resistor R10 is connected in parallel with the capacitor C4, a positive electrode of the voltage regulator tube Z1 is connected with the grid electrode of the field effect tube Q7, a negative electrode of the resistor Z1 is connected with the resistor R11, and a voltage regulator tube output signal output module is connected with the resistor R11, and a voltage regulator tube R11, and a VM output module is connected between the resistor R11.

Further, the motor driving module further comprises an amplifying circuit, the amplifying circuit is connected with the motor control unit, and the amplifying circuit is used for performing overcurrent protection on the motor control unit.

Further, the amplifying circuit comprises a resistor R13, a resistor R14, a resistor R15, a resistor R16, a resistor R17, a resistor R18, a capacitor C8, a capacitor C9 and an operational amplifier A1, wherein the resistor R13 is connected with the input positive pole of the operational amplifier A1, the resistor R13 is grounded through the resistor R14, the resistor R14 is also connected with the capacitor C8 in parallel, the resistor R15 is connected with the input negative pole of the operational amplifier A1, the capacitor C9 is connected between the input negative pole of the operational amplifier A1 and the output end of the operational amplifier A1 in parallel, the capacitor C9 is also connected with the resistor C16 in parallel, the output end of the operational amplifier A1 is connected with one end of the resistor R17, and the other end of the resistor R17 is grounded through the resistor R18.

The utility model has the advantages that:

can reduce the relay and draw the arc current through relay time delay unit control relay turn-off time sequence, effectively avoid the relay adhesion to guarantee the normal operating of relay function, the security of motor also can obtain the guarantee. The output module can output the driving voltage of the motor control unit and the driving voltage of the relay, and can assist in realizing the on-time sequence control of the relay and the field effect tube.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic circuit diagram of an output module according to an embodiment of the present invention;

fig. 3 is a schematic circuit diagram of a motor driving module according to an embodiment of the present invention.

Wherein: 1. the device comprises an output module 2, a motor driving module 21, a motor switch unit 22, a relay delay unit 23, a motor control unit 24, an amplifying circuit 3 and a motor.

Detailed Description

The present invention is further described with reference to the accompanying drawings and examples.

Example (b):

the utility model provides a time sequence control circuit, as shown in fig. 1, includes output module 1 and motor drive module 2, output module is connected with motor drive module, output module is used for providing drive signal for motor drive module, including motor switch unit 21, relay time delay unit 22, motor control unit 23 and amplifier circuit 24 in the motor drive module, motor switch unit is connected with motor 3, motor switch unit is used for opening or turn-off of control motor, relay time delay unit connects on motor switch unit, relay time delay return circuit is used for when the shutoff motor, and control motor switch unit time delay is turn-off. The motor control unit is connected with the motor switch unit, the motor control unit is used for controlling the current in the motor current loop and controlling the opening or closing of the motor switch unit according to the current in the motor current loop, the amplifying circuit is connected with the motor control unit, and the amplifying circuit is used for performing overcurrent protection on the motor control unit.

As shown in fig. 2, the output module includes a power supply voltage VCC, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a capacitor C1, a capacitor C2, a triode Q1, a triode Q2, a diode D1, a diode D2, a diode D3, a diode D4, a diode D5, a diode D6, a switch SW1, and a switch SW2, one end of the resistor R1 is connected to the power supply voltage VCC, the other end of the resistor R1 is connected to the anode of the diode D1 through the resistor R3, the cathode of the diode D1 is grounded through the switch SW1, a capacitor C1 is further connected in series between the anode of the diode D1 and the power supply voltage VCC, the base of the triode Q1 is connected between the resistor R1 and the resistor R3, the emitter of the triode Q1 is connected to the power supply voltage VCC, the collector of the triode Q1 is connected to the anodes of the diode D2 and the diode D3 at the same time, diode D2's negative pole output VM1 drive signal, diode D3's negative pole output VM1+ drive signal, resistance R2's one end is connected with supply voltage VCC, resistance R2's the other end passes through resistance R4 and is connected with diode D4's positive pole, diode D4's negative pole passes through switch SW2 ground connection, it has electric capacity C2 still to establish ties between diode D4's positive pole and the supply voltage VCC, triode Q2's base is connected between resistance R2 and resistance R4, triode Q2's projecting pole is connected with supply voltage VCC, triode Q2's collecting electrode is connected with diode D5 and diode D6's positive pole simultaneously, diode D5's negative pole output VM1 drive signal, diode D6's negative pole output VM 1-drive signal.

When the switch SW1 is pressed down, the output module outputs a motor forward rotation signal M1+, and when the switch SW2 is pressed down, the output module outputs a motor reverse rotation signal M1-.

The circuit schematic diagram of the motor driving module is shown in fig. 3.

Wherein, the motor switch unit comprises a STOP interface, a relay KA1, a relay KA2, a resistor R5, a resistor R6, a triode Q3, a triode Q4, a diode D7, a diode D8, a diode D9, a diode D10, a diode D11 and a transient diode D12, the STOP interface provides STOP voltage, a first coil contact of the relay KA1 and a first coil contact of the relay KA2 are both connected with the STOP interface, a second coil contact of the relay KA1 is connected with a collector of the triode Q3, a base of the triode Q3 is connected with a first port of the resistor R5, a second port of the resistor R5 is connected with an output module to receive VM1+ driving signals, an emitter of the triode Q3 is grounded, a second coil contact of the relay KA1 is also connected with an anode of the diode D7, a cathode of the diode D7 is connected with the STOP interface, the positive pole of the diode D7 is connected with the positive pole of the diode D8, the negative pole of the diode D8 is connected with the output module, the motor positive rotation signal M1+ is received, the second coil contact of the relay KA2 is connected with the collector electrode of the triode Q4, the base electrode of the triode Q4 is connected with the first port of the resistor R6, the second port of the resistor R6 is connected with the output module, the VM 1-driving signal is received, the emitter electrode of the triode Q4 is grounded, the second coil contact of the relay KA2 is also connected with the positive pole of the diode D9, the negative pole of the diode D9 is connected with the STOP interface, the positive pole of the diode D9 is also connected with the positive pole of the diode D10, the negative pole of the diode D10 is connected with the output module, the motor reverse rotation signal M1-, the static normally open contact of the relay KA1 and the static normally open contact of the relay KA2 are both connected with the positive pole of the diode D11, and the negative pole of the diode D11 is connected with the STOP interface, the movable contact of the relay KA1 is connected with one end of the motor, the movable contact of the relay KA2 is connected with the other end of the motor, and the anode of the diode D11 is grounded through a transient diode T1.

The relay delay unit comprises a capacitor C6 and a capacitor C7, one end of the capacitor C6 is connected with the second port of the resistor R5, the other end of the capacitor C6 is grounded, one end of the capacitor C7 is connected with the second port of the resistor R6, and the other end of the capacitor C7 is grounded.

The motor control unit comprises a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R11, a resistor R12, a capacitor C3, a capacitor C4, a capacitor C5, a triode Q6, a voltage regulator tube Z1 and a field effect tube Q7, wherein a drain electrode of the field effect tube Q7 is simultaneously connected with a normally-open static contact of the relay KA1 and a normally-open static contact of the relay KA2, a source electrode of the field effect tube Q7 is grounded through the resistor R7, a grid electrode of the field effect tube Q7 is connected with one end of the resistor R9 through the resistor R8, the other end of the resistor R9 is connected with an emitter electrode of the triode Q5, a collector electrode of the triode Q5 is connected with a base electrode of the triode Q6, an emitter electrode of the triode Q6 is grounded, a collector electrode of the triode Q6 is connected with the emitter electrode of the triode Q5 through the resistor R10, a base electrode of the triode Q6 is also grounded through the capacitor C3, the resistor R10 is also connected with the capacitor C4 in parallel, an anode of the voltage regulator tube Z1 is connected with the grid electrode of the field effect tube Q7, a negative electrode of the resistor Z1 is connected with the resistor R11, and a signal output module of the VM R11 is connected with the resistor R11, and a signal output module.

When the switch SW1 is pressed, the voltage is reduced through the diode D1, voltage division is carried out through the resistor R1 and the resistor R3, the triode Q1 is switched on, after the triode Q1 is switched on, the power supply voltage VCC generates VM1+ driving voltage through the triode Q1 and the diode D3, and meanwhile VM1 driving voltage is generated through the diode D2. The VM1+ driving voltage is connected with the triode Q3 through the resistor R5, so that the coil voltage of the relay KA1 is reduced, the movable contact of the relay KA1 is switched to the normally open stationary contact through the normally closed stationary contact, meanwhile, the VM1 voltage is connected with the field-effect tube Q7 through the resistor R11, the STOP voltage of the STOP interface reaches the field-effect tube Q7 through the motor at the moment, the resistor R7 is grounded, a loop is formed, and the motor starts to rotate forwards.

When the switch SW1 is loosened, the field effect transistor Q7 is turned off firstly, the current in a current loop of the motor begins to become small, but because the capacitor has the characteristic that the voltage can not change suddenly, the triode Q3 is turned off in a delayed mode through the capacitor C6 in the relay delay unit, so that the relay KA1 can be turned off in a delayed mode, after the current is changed into 0, the movable contact of the relay KA1 is converted into a normally closed contact through the normally open contact, the relay is turned off, and the circuit returns to the initial state.

When the switch SW2 is pressed, the voltage is pulled down through the diode D4, voltage division is performed through the resistor R2 and the resistor R4, the triode Q2 is turned on, after the triode Q2 is turned on, the power supply voltage VCC generates VM 1-driving voltage through the triode Q2 and the diode D6, and meanwhile VM1 driving voltage is generated through the diode D5. The VM 1-driving voltage is connected with the triode Q4 through the resistor R6, so that the coil voltage of the relay KA2 is reduced, the moving contact of the relay KA2 is switched from the normally closed static contact to the normally open static contact, meanwhile, the VM1 voltage is connected with the field-effect tube Q7 through the resistor R11, the STOP voltage of the STOP interface reaches the field-effect tube Q7 through the motor, the resistor R7 is grounded, a loop is formed, and the motor starts to rotate reversely.

When the switch SW2 is loosened, the field effect transistor Q7 is turned off firstly, the current in a current loop of the motor begins to become small, but because the capacitor has the characteristic that the voltage can not change suddenly, the capacitor C7 in the relay delay unit enables the triode Q4 to be turned off in a delayed mode, so that the relay KA2 can be turned off in a delayed mode, after the current is changed into 0, the moving contact of the relay KA2 is converted into a normally closed contact from a normally open contact, the relay is turned off, and the circuit returns to an initial state.

When the key is loosened, the field effect transistor Q7 can be turned off firstly, and after the loop current is reduced, the relay is turned off, so that the sequential control of the relay and the field effect transistor is realized.

In order to realize the safe operation of the motor, rz resistors are connected in parallel at the two ends of the motor, and the Rz resistors can be fused in time when the overcurrent condition occurs, so that the safe operation of the motor is guaranteed. The two ends of the motor are also grounded through a capacitor C10 and a capacitor C11 respectively.

Amplifier circuit includes resistance R13, resistance R14, resistance R15, resistance R16, resistance R17, resistance R18, electric capacity C8, electric capacity C9 and operational amplifier A1, resistance R13 is connected with operational amplifier A1's input positive pole, resistance R13 still grounds through resistance R14, still parallelly connected electric capacity C8 on the resistance R14, resistance R15 is connected with operational amplifier A1's input negative pole, still parallelly connected electric capacity C9 between operational amplifier A1's the input negative pole and the output of operational amplifier A1, still parallelly connected resistance C16 on the electric capacity C9, operational amplifier A1's output is connected with resistance R17's one end, resistance R17's the other end still grounds through resistance R18.

The amplifying circuit comprises two input ends, namely an MS1_1 input end and an MS1_2 input end, the MS1_1 input end is connected between a resistor R7 and a source electrode of a field effect tube Q7, the MS1_2 input end is connected between the resistor R7 and the ground, the MS1_1 input end and the MS1_2 input end collect current values at two ends of the resistor R7 respectively and input the current values into an input positive electrode and an input negative electrode of an operational amplifier A1 respectively, and an output end MS1_3 of the amplifying circuit is arranged between a resistor R16 and a resistor R17. When the current between current loops of the motor is overlarge and exceeds a preset value, the output end MS1_3 of the amplifying circuit outputs high voltage to the base electrode of the triode Q6, the triode Q6 is switched on, then the triode Q5 is switched on, the grid driving voltage of the field effect tube Q7 is pulled down, and the field effect tube Q7 is switched off, so that overcurrent protection is realized.

In order to prevent the motor from being abnormal in the running process, the motor control unit and the amplifying circuit are arranged, so that the current loop running of the motor can be timely cut off when the overcurrent condition occurs, and the circuit burning condition is prevented.

The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the scope of the claims.

Claims

1. The utility model provides a time sequence control circuit, its characterized in that, includes output module and motor drive module, output module and motor drive module are connected, output module is used for providing drive signal for motor drive module, including motor switch unit and relay time delay unit in the motor drive module, motor switch unit is connected with the motor, motor switch unit is used for opening or turn-off of control motor, relay time delay unit connects on motor switch unit, relay time delay return circuit is used for when the shutoff motor, and control motor switch unit time delay is turn-offed.

2. The timing control circuit according to claim 1, wherein the output module comprises a supply voltage VCC, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a capacitor C1, a capacitor C2, a transistor Q1, a transistor Q2, a diode D1, a diode D2, a diode D3, a diode D4, a diode D5, a diode D6, a switch SW1, and a switch SW2, one end of the resistor R1 is connected to the supply voltage VCC, the other end of the resistor R1 is connected to an anode of the diode D1 through a resistor R3, a cathode of the diode D1 is grounded through the switch SW1, a capacitor C1 is further connected in series between an anode of the diode D1 and the supply voltage VCC, a base of the transistor Q1 is connected between the resistor R1 and the resistor R3, an emitter of the transistor Q1 is connected to the supply voltage VCC, triode Q1's collecting electrode is connected with diode D2 and diode D3's positive pole simultaneously, diode D2's negative pole output VM1 drive signal, diode D3's negative pole output VM1+ drive signal, resistance R2's one end is connected with supply voltage VCC, resistance R2's the other end passes through resistance R4 and is connected with diode D4's positive pole, switch SW2 ground connection is passed through to diode D4's negative pole, it has electric capacity C2 still to establish ties between diode D4's positive pole and the supply voltage VCC, triode Q2's base is connected between resistance R2 and resistance R4, triode Q2's projecting pole is connected with supply voltage VCC, triode Q2's collecting electrode is connected with diode D5 and diode D6's positive pole simultaneously, diode D5's negative pole output VM1 drive signal, diode D6's negative pole output VM 1-drive signal.

3. The timing control circuit of claim 2, wherein the output module outputs a motor forward rotation signal M1+ when the switch SW1 is pressed, and outputs a motor reverse rotation signal M1-when the switch SW2 is pressed.

4. A timing control circuit according to claim 3, wherein the motor switch unit comprises a STOP interface, a relay KA1, a relay KA2, a resistor R5, a resistor R6, a transistor Q3, a transistor Q4, a diode D7, a diode D8, a diode D9, a diode D10, a diode D11 and a transient diode D12, the STOP interface provides a STOP voltage, a first coil contact of the relay KA1 and a first coil contact of the relay KA2 are connected to the STOP interface, a second coil contact of the relay KA1 is connected to a collector of the transistor Q3, a base of the transistor Q3 is connected to a first port of the resistor R5, a second port of the resistor R5 is connected to the output module for receiving the VM1+ driving signal, an emitter of the transistor Q3 is grounded, a second coil contact of the relay KA1 is further connected to an anode of the diode D7, a cathode of the diode D7 is connected to the STOP interface, an anode of the diode D7 is further connected to an anode of the diode D8, a cathode of the diode D8 is connected to an output module of the relay KA1, a cathode of the relay KA1 is connected to a cathode of the diode Q2 is connected to a base of the transistor Q1, a normally open diode D1, a cathode of the relay KA1 is connected to a diode D2, a cathode of the relay KA1 is connected to a diode D1, a cathode of the relay KA2 is connected to a diode D1, a transistor Q2 is connected to a transistor Q1, a transistor Q2, a transistor Q1, a transistor Q2 is connected to a transistor D10, a transistor Q1, a transistor Q2 is connected to a transistor R1, a transistor Q2, a transistor D10, a transistor D1 is connected to a transistor D10, a transistor D1 is connected to a transistor D1, a transistor D10, a transistor D1 is connected to a transistor D4, a transistor D10, a transistor D4 is connected to a transistor D10, the negative pole of the diode D11 is connected with the STOP interface, the movable contact of the relay KA1 is connected with one end of the motor, the movable contact of the relay KA2 is connected with the other end of the motor, and the positive pole of the diode D11 is grounded through the transient diode T1.

5. The timing control circuit according to claim 4, wherein the relay delay unit comprises a capacitor C6 and a capacitor C7, one end of the capacitor C6 is connected to the second port of the resistor R5, the other end of the capacitor C6 is grounded, one end of the capacitor C7 is connected to the second port of the resistor R6, and the other end of the capacitor C7 is grounded.

6. The timing control circuit according to claim 4, further comprising a motor control unit in the motor driving module, wherein the motor control unit is connected to the motor switch unit, and the motor control unit is configured to control a current magnitude in the motor current loop and control the motor switch unit to turn on or off according to the current in the motor current loop.

7. The timing control circuit according to claim 6, wherein the motor control unit includes a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R11, a resistor R12, a capacitor C3, a capacitor C4, a capacitor C5, a transistor Q6, a regulator tube Z1, and a field-effect tube Q7, a drain of the field-effect tube Q7 is connected to a normally-open stationary contact of the relay KA1 and a normally-open stationary contact of the relay KA2, a source of the field-effect tube Q7 is grounded through the resistor R7, a gate of the field-effect tube Q7 is connected to one end of the resistor R9 through the resistor R8, the other end of the resistor R9 is connected to an emitter of the transistor Q5, a collector of the transistor Q5 is connected to a base of the transistor Q6, an emitter of the transistor Q6 is grounded, a collector of the transistor Q6 is connected to an emitter of the transistor Q5 through the resistor R10, a base of the transistor Q6 is grounded through the capacitor C3, the resistor R10 is connected in parallel with the capacitor C4, a positive electrode of the regulator tube Z1 is connected to a positive electrode of the transistor Q7, a negative electrode of the regulator tube is connected to an emitter of the resistor R1, and a resistor R11 is connected to one end of the resistor R1, and a resistor R11 is connected to a signal receiving module, and a signal receiving module R11, and a resistor R11 is connected to the regulator tube R11, and a resistor R11.

8. The timing control circuit of claim 6, wherein the motor driving module further comprises an amplifying circuit, the amplifying circuit is connected to the motor control unit, and the amplifying circuit is configured to perform over-current protection on the motor control unit.

9. The timing control circuit according to claim 8, wherein the amplifying circuit includes a resistor R13, a resistor R14, a resistor R15, a resistor R16, a resistor R17, a resistor R18, a capacitor C8, a capacitor C9, and an operational amplifier A1, the resistor R13 is connected to an input positive electrode of the operational amplifier A1, the resistor R13 is further connected to ground through the resistor R14, the resistor R14 is further connected in parallel to the capacitor C8, the resistor R15 is connected to an input negative electrode of the operational amplifier A1, the capacitor C9 is further connected in parallel between an input negative electrode of the operational amplifier A1 and an output end of the operational amplifier A1, the capacitor C9 is further connected in parallel to a resistor C16, an output end of the operational amplifier A1 is connected to one end of the resistor R17, and the other end of the resistor R17 is further connected to ground through the resistor R18.